# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

name: Build

on:
  push:
    branches: ['main']
  pull_request:
    branches: ['main']

jobs:
  build:

    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-2019]
        python-version: [3.6, 3.7, 3.8, 3.9]

    steps:
      - uses: actions/checkout@v2
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}
      - name: If mac, install libomp to facilitate lgbm install
        if: matrix.os == 'macOS-latest'
        run: |
          brew install libomp
          export CC=/usr/bin/clang
          export CXX=/usr/bin/clang++
          export CPPFLAGS="$CPPFLAGS -Xpreprocessor -fopenmp"
          export CFLAGS="$CFLAGS -I/usr/local/opt/libomp/include"
          export CXXFLAGS="$CXXFLAGS -I/usr/local/opt/libomp/include"
          export LDFLAGS="$LDFLAGS -Wl,-rpath,/usr/local/opt/libomp/lib -L/usr/local/opt/libomp/lib -lomp"
      - name: Install packages and dependencies
        run: |
          python -m pip install --upgrade pip
          pip install -e .[test]
      - name: If linux or mac, install ray
        if: (matrix.os == 'macOS-latest' || matrix.os == 'ubuntu-latest') && matrix.python-version != '3.9'
        run: |
          pip install -e .[ray,forecast]
          pip install 'tensorboardX<=2.2'
      - name: Lint with flake8
        run: |
          # stop the build if there are Python syntax errors or undefined names
          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
      - name: Test with pytest
        if: ${{ matrix.python-version != '3.7' || matrix.os == 'macos-latest' }}
        run: |
          pytest test
      - name: Coverage
        if: ${{ matrix.python-version == '3.7' && matrix.os != 'macos-latest' }}
        run: |
          pip install coverage
          coverage run -a -m pytest test
          coverage xml
      - name: Upload coverage to Codecov
        if: ${{ matrix.python-version == '3.7' && matrix.os != 'macos-latest' }}
        uses: codecov/codecov-action@v1
        with:
          file: ./coverage.xml
          flags: unittests
  
  docs:

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - name: Setup Python
        uses: actions/setup-python@v2
        with:
          python-version: '3.8'
      - name: Compile documentation
        run: |
            pip install -e .
            python -m pip install sphinx sphinx_rtd_theme
            cd docs
            make html
      - name: Deploy to GitHub pages
        if: ${{ github.ref == 'refs/heads/main' }}
        uses: JamesIves/github-pages-deploy-action@3.6.2
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          BRANCH: gh-pages
          FOLDER: docs/_build/html
          CLEAN: true